linux-kernel - Re: [PATCH] exit signals: use of uninitialized field notify

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Message-ID: <alpine.DEB.1.00.0808271721140.15543@abydos.NerdBox.Net>
Date:	Wed, 27 Aug 2008 17:27:00 -0700 (PDT)
From:	Steve VanDeBogart <vandebo-lkml@...dBox.Net>
To:	Ingo Molnar <mingo@...e.hu>
cc:	linux-kernel@...r.kernel.org, Roland McGrath <roland@...hat.com>,
	Oleg Nesterov <oleg@...sign.ru>
Subject: Re: [PATCH] exit signals: use of uninitialized field notify_count

On Wed, 27 Aug 2008, Ingo Molnar wrote:

>
> * Steve VanDeBogart <vandebo-lkml@...dBox.Net> wrote:
>
>> task->signal->notify_count is only initialized if
>> task->signal->group_exit_task is not NULL.  Reorder a conditional so
>> that uninitialised memory is not used.  Found by Valgrind.
>>
>> Signed-off-by: Steve VanDeBogart <vandebo-lkml@...dbox.net>
>
> Applied the commit below to tip/core/urgent, thanks. Roland/Oleg, do you
> concur with the fix?
>
> nice find btw. - are you running Valgrind on UML?

Thanks.  Yes, I am running Valgrind on UML.  I revisited the previous 
patches that allowed it and tried to remove any unnecessary changes.
The patches and a recipe on how to make it work can be found on the
UML wiki: http://uml.jfdi.org/uml/Wiki.jsp?page=ValgrindingUML

I'll stir up trouble by posting the kernel patches on lkml after a
little more cleanup.

--
Steve
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